<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style>
			input{
				/*边框是占位置的*/
				/*border:100px solid blue;*/
				/*轮廓线不占位置*/
				outline: 100px solid blue;
			}
		</style>
	</head>
	<body>
		<input type="text" name="" id="" /><span>123123</span>
	</body>
</html>
